package Test;

import java.util.Scanner;

public class UppDown {
    public static String lowDown(String a){
        return a.toLowerCase();
    }
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);

        while(sc.hasNext()) {
            String a = sc.nextLine();
            System.out.println(lowDown(a));
        }
    }
}
